LYMPHATIC MALFORMATIONS are rare, and very serious conditions, that require specialized treatment. For details about these conditions, readLymphatic Malformations.

MALIGNANT LYMPHEDEMA, Lymphangiosarcoma, or Stewart-Treves Syndrome, is a rare malignant tumor which can occur in long-standing cases of primary or secondary lymphedema. However, it is the tumor, NOT the lymphedema, that is malignant.

FILARIARIASIS is a different form of lymphedema caused by a parasitic worm and most often contracted in tropical countries. To learn more about this condition, refer to the article Filariasis.